channel sort window (a special view that only shows channel names in a compact view and let them sort per drag and drop) + search with auto complete, if you search for RTL you got instantly ~20 channels you can select and drag to position (should be a huge easing for this task)

Webix - an advanced, easy to learn, mobile-friendly, responsive and rich free&open source JavaScript UI components library. Webix spun off from DHTMLX Touch (a project with 8 years of development behind it) and went on to become a standalone UI components framework.

Webix - an advanced, easy to learn, mobile-friendly, responsive and rich free&open source JavaScript UI components library. Webix spun off from DHTMLX Touch (a project with 8 years of development behind it) and went on to become a standalone UI components framework.

I looked at webix and thought it was promising but then decided against it due to some widgets - that might be needed - being commercial only.